.pd {
    max-width: 1200px;
    margin: 0 auto;
}

.no-copy {
    -webkit-user-select: none;
    /* Safari, Chrome 和新版 Opera */
    -moz-user-select: none;
    /* Firefox */
    -ms-user-select: none;
    /* IE 10+ 和 Edge */
    user-select: none;
    /* 标准语法 */
}

body {
    -moz-user-select: none;
    /*火狐*/
    -webkit-user-select: none;
    /*webkit浏览器*/
    -ms-user-select: none;
    /*IE10*/
    user-select: none;
    /*选中文字时避免出现蓝色背景*/
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);

}

#app {
    font-family: Avenir, Helvetica, Arial, sans-serif;
}

* {

    padding: 0;
    margin: 0;
    box-sizing: border-box;
}


/* 导航栏 */
.nav {
    background-color: #333333;
    height: 83px;
    width: 100%;
    position: fixed;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 999;
}

.nav .box {
    flex: 1;
    color: #ffcc00;
    display: flex;
    justify-content: end;
}

.nav .box .list {
    margin: 0 40px;
    font-size: 16px;
    font-weight: 700;
    padding: 16px;
    cursor: pointer;
}

.nav .box .list:hover {
    color: #fff;
}

.nav .active {
    color: #ffff;
}

.nav .active2 {
    color: #ffcc00;
}

.nav img {
    width: 271px;
    height: 83px;
}

.box3 {
    padding-right: 30px;
    flex: 1;
    justify-content: end;
    display: flex;
    display: none;
}

.box3 .box-list {
    width: 170vw;
    height: 0;
    position: absolute;
    overflow: hidden;
    background: #fff;
    transition: all 0.2s;
    top: 83px;
    left: 0;
}

.box3 .box-list div {
    padding: 20px;
    border-bottom: 1px solid #e9e9e9;
}

@media screen and (max-width: 700px) {
    .navbox {
        display: none !important;
    }
    .box3 {
        display: flex !important;
    }
}

a {
    color: inherit;
    text-decoration: none;
}

/* 底部 */

.footer {
    padding: 30px 0 0 0;
    position: relative;
    color: #fff;
    background-color: #111111;
    height: 211px;
}

.footer .footer-box {
    width: 100%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    position: absolute;
    text-align: center;
}

.footer-bottom {
    background-color: #3A3A3A;
    text-align: center;
    height: 86px;
    color: #fff;
    line-height: 86px;
}


.tab {
    display: flex;
    background-color: #f8f9f9;
    align-items: center;
    padding: 10px 0;
}

.tab .dh {
    font-size: 25px;
    font-weight: bold;
    border-bottom: 2px solid transparent;
    /* 使用透明色代替#00000000 */
    cursor: pointer;
}

.tab .dh:hover {
    border-bottom: 2px solid #000;
}